Respuesta :

mhanifa

Answer:

B. 4

Step-by-step explanation:

Let the side of the square= a

Then the area of the square= a²

Given:

  • a= √x²-4 and a²=12

Then:

  • a²= (√x²-4 )²= x²-4

Considering the value of the area, 12 units

  • x²-4 =12
  • x²=16
  • x= √16
  • x= ±4
  • x= -4 is not considered as the length can't be negative
  • x= 4 is the answer

Correct choice is B. 4
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